Operation Radar Tank Gauge
36 Installation and Operations Manual
5.2.3 Key assignment
The operating elements are located inside the housing and are accessible for operation
by opening the lid of the housing.
Function of the keys
Table 2: Function of the keys
Custody locking switch
Access to the electronics can be prevented by means of a custody locking switch that
locks the device settings; see fig. 4 on Page 34.
The custody locking switch can be sealed for custody transfer applications.
Software reliability
The software used in the 7500 RTG fulfills the requirements of
OIML R85. This particularly includes:
• cyclical test of data consistency
• non-volatile memory
• segmented data storage
The 7500 RTG continuously monitor the compliance with accuracy requirements for
custody transfer measurements according to OIML R85. If the accuracy cannot be
maintained, a specific alarm is generated on the local display and via the digital
communication
Key(s) Meaning
O or V
Navigate upwards in the selection list
Edit numeric value within a function
S or W
Navigate downwards in the selection list
Edit numeric value within a function
X or Z Navigate to the left within a function group
F or M Navigate to the right within a function group, confirmation.
O and F
or
S and F
Contrast settings of the LCD
O and S and F
Hardware lock / unlock
After a hardware lock, an operation of the instrument via display or
communication is not possible!
The hardware can only be unlocked via the display. An unlock parameter must
be entered to do so.
